Warning: Permanently added '10.128.1.124' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 90.941030][ T38] audit: type=1400 audit(1624250142.974:8): avc: denied { execmem } for pid=8431 comm="syz-executor483" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 90.963544][ T8431] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:0' [ 90.972191][ T8431] CPU: 1 PID: 8431 Comm: syz-executor483 Not tainted 5.13.0-rc6-syzkaller #0 [ 90.981144][ T8431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.991433][ T8431] Call Trace: [ 90.994762][ T8431] dump_stack+0x141/0x1d7 [ 90.999195][ T8431] sysfs_warn_dup.cold+0x1c/0x29 [ 91.004135][ T8431] sysfs_create_dir_ns+0x233/0x290 [ 91.009516][ T8431] ? sysfs_create_mount_point+0xb0/0xb0 [ 91.015055][ T8431] ? rwlock_bug.part.0+0x90/0x90 [ 91.019991][ T8431] ? class_dir_child_ns_type+0x9/0x60 [ 91.025374][ T8431] kobject_add_internal+0x2d2/0xa60 [ 91.030688][ T8431] kobject_add+0x150/0x1c0 [ 91.035113][ T8431] ? kset_create_and_add+0x190/0x190 [ 91.040623][ T8431] ? lockdep_init_map_type+0x2c3/0x7b0 [ 91.046184][ T8431] device_add+0x36a/0x2100 [ 91.050655][ T8431] ? __fw_devlink_link_to_suppliers+0x5e0/0x5e0 [ 91.056903][ T8431] ? rcu_read_lock_sched_held+0x3a/0x70 [ 91.062444][ T8431] ? kfree+0x28d/0x2c0 [ 91.066529][ T8431] device_create_groups_vargs+0x203/0x280 [ 91.072339][ T8431] device_create+0xdf/0x120 [ 91.076861][ T8431] ? device_create_groups_vargs+0x280/0x280 [ 91.083328][ T8431] ? pointer+0xa00/0xa00 [ 91.087704][ T8431] ? vsnprintf+0x281/0x14f0 [ 91.092398][ T8431] bdi_register_va.part.0+0x9c/0x800 [ 91.097701][ T8431] ? cgwb_kill+0x450/0x450 [ 91.102127][ T8431] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 91.108866][ T8431] ? __wake_up_common_lock+0xde/0x130 [ 91.114350][ T8431] bdi_register+0x12a/0x140 [ 91.118882][ T8431] ? bdi_register_va.part.0+0x800/0x800 [ 91.124708][ T8431] __device_add_disk+0xe62/0x1230 [ 91.130150][ T8431] ? lockdep_init_map_type+0x2c3/0x7b0 [ 91.135670][ T8431] ? blk_alloc_devt+0x240/0x240 [ 91.140629][ T8431] ? lockdep_init_map_type+0x2c3/0x7b0 [ 91.146349][ T8431] loop_add+0x671/0x900 [ 91.150691][ T8431] loop_control_ioctl+0x16c/0x4c0 [ 91.156197][ T8431] ? loop_lookup+0x1d0/0x1d0 [ 91.161030][ T8431] ? security_file_ioctl+0x5c/0xb0 [ 91.166332][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 91.172691][ T8431] ? loop_lookup+0x1d0/0x1d0 [ 91.177353][ T8431] __x64_sys_ioctl+0x193/0x200 [ 91.182146][ T8431] do_syscall_64+0x3a/0xb0 [ 91.186674][ T8431] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 91.192831][ T8431] RIP: 0033:0x43ee49 [ 91.197097][ T8431] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 91.217048][ T8431] RSP: 002b:00007ffc5b11a788 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 91.225515][ T8431] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee49 [ 91.233613][ T8431] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 91.242336][ T8431] RBP: 0000000000402e30 R08: 0000000000000000 R09: 0000000000400488 [ 91.250720][ T8431] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ec0 [ 91.258978][ T8431] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 91.270022][ T8431] kobject_add_internal failed for 7:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 91.283916][ T8431] ------------[ cut here ]------------ [ 91.289477][ T8431] WARNING: CPU: 0 PID: 8431 at block/genhd.c:549 __device_add_disk+0xf56/0x1230 [ 91.298949][ T8431] Modules linked in: [ 91.304327][ T8431] CPU: 0 PID: 8431 Comm: syz-executor483 Not tainted 5.13.0-rc6-syzkaller #0 [ 91.314786][ T8431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.325495][ T8431] RIP: 0010:__device_add_disk+0xf56/0x1230 [ 91.332062][ T8431] Code: f1 ff ff e8 ec a3 b5 fd 0f 0b e9 26 fa ff ff 48 89 7c 24 20 e8 db a3 b5 fd 0f 0b 48 8b 7c 24 20 e9 5e f5 ff ff e8 ca a3 b5 fd <0f> 0b e9 1a ff ff ff 4c 89 ef e8 eb 46 fa fd e9 fb f1 ff ff 48 8b [ 91.353573][ T8431] RSP: 0018:ffffc90001b2fd30 EFLAGS: 00010293 [ 91.359837][ T8431] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 91.368567][ T8431] RDX: ffff8880226c8100 RSI: ffffffff83be6e06 RDI: 0000000000000003 [ 91.377980][ T8431] RBP: ffff888030427c00 R08: 0000000000000000 R09: ffffffff9022e8ff [ 91.387141][ T8431] R10: ffffffff83be6d1e R11: 0000000000084087 R12: 00000000ffffffef [ 91.395974][ T8431] R13: ffff888030427ca0 R14: ffff88803df94150 R15: ffff88802f090000 [ 91.404201][ T8431] FS: 0000000000521300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 91.414069][ T8431] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.421465][ T8431] CR2: 00007fdc821ae000 CR3: 0000000022f89000 CR4: 00000000001506f0 [ 91.429590][ T8431] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.437769][ T8431] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.446015][ T8431] Call Trace: [ 91.449392][ T8431] ? lockdep_init_map_type+0x2c3/0x7b0 [ 91.454941][ T8431] ? blk_alloc_devt+0x240/0x240 [ 91.459904][ T8431] ? lockdep_init_map_type+0x2c3/0x7b0 [ 91.465896][ T8431] loop_add+0x671/0x900 [ 91.470090][ T8431] loop_control_ioctl+0x16c/0x4c0 [ 91.475899][ T8431] ? loop_lookup+0x1d0/0x1d0 [ 91.480772][ T8431] ? security_file_ioctl+0x5c/0xb0 [ 91.485908][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 91.492340][ T8431] ? loop_lookup+0x1d0/0x1d0 [ 91.497253][ T8431] __x64_sys_ioctl+0x193/0x200 [ 91.502177][ T8431] do_syscall_64+0x3a/0xb0 [ 91.506638][ T8431] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 91.512630][ T8431] RIP: 0033:0x43ee49 [ 91.516626][ T8431] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 91.537938][ T8431] RSP: 002b:00007ffc5b11a788 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 91.547382][ T8431] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee49 [ 91.556296][ T8431] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 91.565517][ T8431] RBP: 0000000000402e30 R08: 0000000000000000 R09: 0000000000400488 [ 91.573921][ T8431] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ec0 [ 91.582114][ T8431] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 91.590443][ T8431] Kernel panic - not syncing: panic_on_warn set ... [ 91.597065][ T8431] CPU: 0 PID: 8431 Comm: syz-executor483 Not tainted 5.13.0-rc6-syzkaller #0 [ 91.606089][ T8431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.616164][ T8431] Call Trace: [ 91.619458][ T8431] dump_stack+0x141/0x1d7 [ 91.623978][ T8431] panic+0x306/0x73d [ 91.627968][ T8431] ? __warn_printk+0xf3/0xf3 [ 91.632563][ T8431] ? __warn.cold+0x1a/0x44 [ 91.637058][ T8431] ? __device_add_disk+0xf56/0x1230 [ 91.642461][ T8431] __warn.cold+0x35/0x44 [ 91.646783][ T8431] ? __device_add_disk+0xf56/0x1230 [ 91.651970][ T8431] report_bug+0x1bd/0x210 [ 91.656401][ T8431] handle_bug+0x3c/0x60 [ 91.660649][ T8431] exc_invalid_op+0x14/0x40 [ 91.665230][ T8431] asm_exc_invalid_op+0x12/0x20 [ 91.670075][ T8431] RIP: 0010:__device_add_disk+0xf56/0x1230 [ 91.675883][ T8431] Code: f1 ff ff e8 ec a3 b5 fd 0f 0b e9 26 fa ff ff 48 89 7c 24 20 e8 db a3 b5 fd 0f 0b 48 8b 7c 24 20 e9 5e f5 ff ff e8 ca a3 b5 fd <0f> 0b e9 1a ff ff ff 4c 89 ef e8 eb 46 fa fd e9 fb f1 ff ff 48 8b [ 91.696040][ T8431] RSP: 0018:ffffc90001b2fd30 EFLAGS: 00010293 [ 91.702280][ T8431] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 91.710346][ T8431] RDX: ffff8880226c8100 RSI: ffffffff83be6e06 RDI: 0000000000000003 [ 91.718369][ T8431] RBP: ffff888030427c00 R08: 0000000000000000 R09: ffffffff9022e8ff [ 91.726578][ T8431] R10: ffffffff83be6d1e R11: 0000000000084087 R12: 00000000ffffffef [ 91.734871][ T8431] R13: ffff888030427ca0 R14: ffff88803df94150 R15: ffff88802f090000 [ 91.743953][ T8431] ? __device_add_disk+0xe6e/0x1230 [ 91.749432][ T8431] ? __device_add_disk+0xf56/0x1230 [ 91.755838][ T8431] ? lockdep_init_map_type+0x2c3/0x7b0 [ 91.761629][ T8431] ? blk_alloc_devt+0x240/0x240 [ 91.766783][ T8431] ? lockdep_init_map_type+0x2c3/0x7b0 [ 91.772744][ T8431] loop_add+0x671/0x900 [ 91.777176][ T8431] loop_control_ioctl+0x16c/0x4c0 [ 91.782550][ T8431] ? loop_lookup+0x1d0/0x1d0 [ 91.787386][ T8431] ? security_file_ioctl+0x5c/0xb0 [ 91.792799][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 91.799353][ T8431] ? loop_lookup+0x1d0/0x1d0 [ 91.804525][ T8431] __x64_sys_ioctl+0x193/0x200 [ 91.809300][ T8431] do_syscall_64+0x3a/0xb0 [ 91.813718][ T8431] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 91.819988][ T8431] RIP: 0033:0x43ee49 [ 91.823900][ T8431] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 91.844368][ T8431] RSP: 002b:00007ffc5b11a788 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 91.852980][ T8431] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee49 [ 91.861063][ T8431] RDX: 0000000000200000 RSI: 0000000000004c80 RDI: 0000000000000003 [ 91.869179][ T8431] RBP: 0000000000402e30 R08: 0000000000000000 R09: 0000000000400488 [ 91.877401][ T8431] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ec0 [ 91.885571][ T8431] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 91.897418][ T8431] Kernel Offset: disabled [ 91.904360][ T8431] Rebooting in 86400 seconds..